This is a fascinating memory question! The answer depends on several factors, but I can give you a reasonable estimate.
For an **untrained person using passive observation** (just looking without trying to memorize), the odds are probably quite low - maybe **10-30%**. Here's why:
**Working against recall:**
- 9 items exceeds the typical working memory capacity (7±2 items)
- Spatial memory for grid locations requires effort to encode
- 5 minutes is long enough for significant decay without rehearsal
- Random selection means they can't guess strategically
**Working in favor of recall:**
- Short phrases are more memorable than random symbols
- 20 seconds is decent exposure time
- A 3×3 grid is a simple, familiar structure
- Some positions (corners, center) naturally draw more attention
**If the person actively tries to memorize** the locations, odds jump dramatically - probably to **60-80%** or higher. People can use strategies like:
- Chunking items by position
- Creating a mental story linking phrases to locations
- Rehearsing during the 5-minute interval
The **center position and corners** would likely be remembered best (the "serial position effect" applies spatially too), while edge positions might be forgotten more often.
The exact odds would vary quite a bit based on the phrases themselves and whether people know they'll be tested.




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